Vertical Stack Water Source Heat Pump Catalog

Heating

Cooling

Fresh Air

Clean Air

Zehnder – everything you need to create a comfortable, healthy and energy-efficient indoor climate Heating, cooling, fresh and clean air: at Zehnder, you will find everything you need to create a comfortable, healthy and energy-efficient indoor climate. Zehnder’s wide and clearly structured portfolio can offer the right product for any project, be it private, public or commercial, new build or refurbishment. And where service is also concerned, you’ll find that Zehnder is “always around you.” Heating

At Zehnder, Heating doesn’t just come in the form of designer radiators. We offer solutions in all shapes and sizes, from radiant ceiling panels to heat pumps with integrated ventilation devices. Designer radiators „„ Compact energy station with „„ integrated heat pump Heating and cooling ceiling „„ systems Comfortable indoor „„ ventilation with heat recovery

Zehnder Designer Radiators

Cooling

Zehnder also offers sophisticated solutions for indoor Cooling. These range from cooling ceiling systems to comfortable indoor ventilation with a supply of pre-cooled fresh air. Heating and cooling ceiling „„ systems Compact energy station with „„ heat pump and brine pipe Comfortable indoor „„ ventilation with geothermal heat exchanger for fresh air pre-cooling

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Zehnder Heating and Cooling Ceiling Systems

Fresh Air

Fresh Air – a product range with a long tradition at Zehnder. Zehnder Comfosystems provides products and solutions for comfortable indoor ventilation with heat recovery for houses and apartments, for new builds and for renovation projects. Comfortable indoor „„ ventilation Compact energy station with „„ integrated ventilation device

Zehnder Comfosystems

Clean Air

Zehnder Clean Air Solutions provide Clean Air in buildings particularly prone to dust. In residential applications, the comfortable indoor ventilation provided by Zehnder Comfosystems filters external pollutants out of the air. Comfortable indoor „„ ventilation with integrated fresh-air filter Compact energy station „„ with integrated fresh-air filter Systems for clean air „„

Zehnder Clean Air Solutions

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Certified efficiencies for water loop, ground water and ground loop applications The perfect room climate is today, more than ever, a question of economic energy use and active climate control. The solution for efficient and energy-saving heating and cooling is the Zehnder Rittling Vertical Stack Water Source Heat Pump. Simple to install and virtually unheard, the Zehnder Rittling Vertical Stack Water Source Heat Pump provides the quietest solution to the commercial marketplace. All seven sizes exceed ASHRAE standard 90.1 energy efficiency requirements using environmentally friendly R-410A refrigerant. As well as the reliably high product quality associated with all Zehnder Rittling products, the Zehnder Rittling Vertical Stack Water Source Heat Pump offers a number of advantages: the heavy duty construction and custom applications capability provided by the Zehnder Rittling engineering team maximizes flexibility of selection and minimizes cost of installation specifically for single and multi-floor applications. Zehnder Rittling Heat Pumps were the first to market with drop-down service legs as well as wheels on the bottom of the chassis and inside the cabinet that make removal of the chassis during service and testing a thing of the past. In addition to this, Zehnder Rittling experts are able to help with complex specification plans through our competent sales team who can visit the site if requested.

Features 5 Nomenclature 7 Ratings and data 11 Sequence of operation 17 Piping and risers 18 Dimensions and data 20 Mechanical specifications 33 Warranty Back cover

Effective technology creates the perfect indoor climate

The broad range of options associated with the Zehnder Rittling Vertical Stack Water Source Heat Pumps provide the needed flexibility to fit a wide range of applications. These units are often positioned in the corner of a room but can just as easily be set along a perimeter wall or as part of a partition wall separating two rooms. These units are typically stand-alone ductless systems that can be placed in a multitude of arrangements by taking into account the aesthetics and space requirements of the room. Advantages The simplest and most effective solutions are always those that come from nature; this is the case for the Zehnder Rittling Vertical Stack Water Source Heat Pump. Our design takes advantage of the moderate temperature the earth provides to boost the efficiency of the energy draw and reduce the operational costs of heating and cooling systems. Zehnder Rittling Vertical Stack Water Source Heat Pumps are the direct result of years of research and extensive testing in our state-of-the-art design lab by our dedicated team of engineers. As a result, the Heat Pump design lends itself equally to new and retrofit applications.

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Promoting healthy indoor air quality Zehnder Rittling Vertical Stack Water Source Heat Pumps incorporate coated aluminum air coils to expedite condensate drainage. Additionally, the standard stainless steel drain pan with microprocessor based condensate overflow protection inhibits microbial growth and minimizes maintenance. The perfect indoor climate: comfortable, yet unobtrusive Aesthetics and efficiency are our primary concerns. The Zehnder Rittling Vertical Stack Water Source Heat Pump operates in the background only noticeable by the perfect indoor climate the architectural design of the room remains in the forefront not the heating and cooling system.

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Features 1. Chassis „„ Seven available sizes named for their nominal capacities -- 09: 9,000 BTU/hr -- 12: 12,000 BTU/hr -- 15: 15,000 BTU/hr -- 18: 18,000 BTU/hr -- 24: 24,000 BTU/hr -- 30: 30,000 BTU/hr -- 36: 36,000 BTU/hr „„ Exceeds ASHRAE 90.1 efficiency requirements using environmentally friendly R-410A refrigerant. „„ Front service ports for refrigerant system maintenance. „„ 208-230V/60/1 compressor. „„ TXV metering device. „„ Appliance wheels, drop down service legs and electrical quick connects for system maintenance. „„ Insulated water/refrigeration piping for low temperature applications. „„ Sound attenuation package including dual compressor isolation.

2. Return air panel

6. Air filter

„„ 18-gauge construction with

„„ Washable nylon

16-gauge and 14-gauge options. „„ Removable perimeter bypass (Allen lock), hinged perimeter bypass (key lock or Allen lock) and removable louvered (Allen lock). „„ Ivory epoxy powder coating is standard. 3. Cabinet „„ 20-gauge galvanized steel

construction. „„ Two sizes available.

-- Small: 18" x 18" x 88" for sizes 09,12, 15 and 18 -- Large: 24" x 24" x 88" for sizes 24, 30 and 36 „„ 1/2" thick, 2 lb. density mattfaced fiberglass insulation. „„ Pre-configured riser knockouts: left, right and rear. „„ Pre-configured supply air knockouts: left, right, rear, front and top.

7. Controls „„ Standard unit

mounted microprocessor control with system troubleshooting codes and dip switches. „„ 24V, 50VA transformer with resettable fuse. „„ Low/high pressure switches. „„ Air side and water side freeze protection sensors. „„ Electronic condensate overflow protection. 8. Air coil „„ Multi-louvered, lanced aluminum fins. „„ Rifled copper tube construction. „„ Hydrophilic coating. 9. Compressor „„ Rotary type or scroll type,

4. Removable blower/motor assembly „„ 208-230V/60/1 permanent split capacitor type motor. „„ Easily removable assembly with motor quick connect. 5. Stainless steel drain pan „„ Factory installed P-trap. „„ Externally insulated using closed cell foam. „„ Positively sloped in two directions to ensure proper drainage and maximize protection against microbial growth.

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type.

dependent upon size. „„ Wrapped in an insulation

blanket for noise attenuation.

Options and accessory equipment Factory assembled Chassis Available in 277V/60/1. „„ Air filter 1" disposable spun „„ glass media filter. Disconnect switch 20 amp DPST: sizes 09-18. „„ 30 amp DPST: sizes 24-36. „„ Pre-wired and factory installed. „„ Autoflow valves 1/2" 1.5 GPM „„ through 3.0 GPM: sizes 09-12. 3/4" 2.0 GPM „„ through 10.5 GPM: sizes 1536. Hose kits 1/2": sizes 09-12. „„ 3/4": sizes 15-36. „„ Designed for water source heat „„ pump applications. Kevlar® reinforced EPDM core „„ with ANSI 302-304 stainless steel outer braid.

Field assembled Return door panels Standard perimeter bypass „„ Allen lock; removable. Optional perimeter bypass „„ Allen lock or key lock: hinged. Optional louvered Allen lock, „„ removable. 6 standard colors. „„ Custom colors available „„ upon request with customersupplied paint chip. Contact factory for ADA „„ options.

Zone valves 24V normally closed, 2-way. „„ Factory installed on water supply „„ side of chassis. Factory quick-connect plug; „„ factory-wired and controlled by Zehnder Rittling’s microprocessor (PCB). Cabinet Standalone (VHNA), Master (VHNM) „„ or Slave (VHNS) models available. 1/2" thick foil-faced fiberglass or „„ closed cell insulation. Sight and sound baffles. „„ Contact the factory for other „„ cabinet heights.

Controls LonWorks or BACnet network „„ communication interface. Customer supplied DDC „„ controls. Risers Diameters from 3/4" – 2-1/2" „„ with 3" swaged connections. 104"-115" standard lengths. „„ Type L or M copper. „„ Uninsulated or insulated with „„ 1/2" or 3/4" closed-cell foam. Ship loose risers available „„ upon request. Contact the factory for: „„ -- Type K copper -- 3" diameter -- Lengths up to 120"

Blower motors Available in 277V/60/1. „„ 208-230V/60/1 and 277V/60/1 high „„ static motors to handle up to 0.6" of external static pressure. Electronically commutated „„ motors (ECM) are high efficiency, programmable brushless DC motors that utilize a permanent magnetic rotor and built-in inverter.

Wall mounted thermostats Three types to choose from: Communicating thermostat with „„ remote control. -- Timed power on/off. -- Fan speed settings. -- °F or°C readout. -- Troubleshooting failure code(s). -- Pre-wired quick connection. Digital programmable. „„ -- Large display, programmable 5-1-1. -- Pre-wired quick connection. Non-programmable. „„ -- Large display digital thermostat. -- Pre-wired quick connection.

Discharge grille(s) Single deflection, double „„ deflection or double deflection with opposed blade damper. Aluminum construction. „„ Color matched to return air „„ panel. Riser extensions Diameters from 3/4" – 2-1/2" „„ with 3" swaged connections. Up to 24" length. „„ Type L or M copper. „„ Uninsulated or insulated with „„ 1/2" or 3/4" closed-cell foam.

Features

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Exploded installation view Stand Alone unit Features not shown:

Discharge grille(s) Single deflection „„

Cabinet 18" x 24" x 88" or 24" x 24" x 88" „„ 20-gauge galvanized steel „„

„„ Double deflection „„ Double deflection with opposed damper

Stainless steel drain pan Factory-installed P-trap „„ Positively sloped in two directions „„

5/8" thick drywall

Risers Standard diameters: 3/4" to 2-1/2" „„

Controls

Standard lengths: 104" – 115" „„

Standard microprocessor (PCB) „„

S tandard type L or M „„

„„ Optional LonWorks or BACnet

Insulated or uninsulated „„

„„ Optional customer supplied

Compressor Rotary or scroll-type „„ Wrapped in insulation blanket „„ Air coil Multi-louvered, lanced „„ aluminum fins Rifled copper tube construction „„ Hydrophilic coating „„

DDC controls

Removable blower/motor assembly Standard PSC-type motor „„ Optional EC motors „„ Air filter Standrard washable „„ nylon-type filter

Optional disposable „„ fiberglass-type filter

Return air panel Standard 18-gauge construction „„ Optional 16-gauge or 14-gauge „„ Removable perimeter bypass, „„ hinged perimeter bypass or removable louvered

Unit chassis

„„ 7 sizes available Front service ports for „„ refrigeration (behind access panel)

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Nomenclature VS series, complete unit 1, 2, 3

4

5, 6

7

8

9

10

11

12, 13

14

15

16

17

18

19

20

21

22

23

24, 25

VHN

M

09

A

A

X

S

X

DB

1

D

A

X

A

1

1

A

A

–

AA

Unit type VHN = Vertical Stack Water Source Heat Pump complete

Special option codes AA = Standard

Model M = Master S = Slave A = Stand Alone

Placeholder Revision level A = Rev. 1 Supply air size X = None A = 10" x 8" (09-18) B = 12" x 10" (09, 12, 24-36) C = 14" x 12" (15, 18) D = 16" x 14" (24-36)

Nominal capacity 09 = 9,000 BTU/Hr 12 = 12,000 BTU/Hr 15 = 15,000 BTU/Hr 18 = 18,000 BTU/Hr 24 = 24,000 BTU/Hr 30 = 30,000 BTU/Hr 36 = 36,000 BTU/Hr

Cabinet 1 = 88" 3 = Custom

Voltage A = 208-230V/60/1 B = 277V/60/1

Air filter 1 = Washable 2 = 1" throwaway

Blower/motor options A = Standard/PSC B = High static/PSC C = Standard/ECM D = High static/ECM

Hose kit (3') X = None A = 1/2" B = 3/4" Y strainer X = None A = 1/2" Y strainer (09, 12)

Options X = None (standard) S = With sight and sound baffle Controls S = Microprocessor controls C = Microprocessor and customer supplied DDC controls L = Microprocessor and Lon Network Communication B = Microprocessor and BACnet network communication N = Microprocessor and N2 network communication Power termination X = No disconnect 1 = Disconnect switch Supply air/risers NA = None/back NB = None/right NC = None/left SA = Front/back SB = Right/back SC = Left/back SD = Top/back SE = Left/right SF = Front/right SG = Back/right SH = Top/right SJ = Right/left SK = Back/left SL = Front/left SM = Top/left

DA = Front, right/back DB = Front, left/back DC = Left, right/back DD = Front, top/back DE = Front, left/right DF = Back, left/right DG = Front, back/right DH = Left, top/back DJ = Back, right/left DK = Front, right/left DL = Front, back/left DM = Right, top/back DN = Front, top/left DO = Back, top/left DP = Right, top/left DQ = front, top/right DR = Back, top/right DS = Left, top/right

TA = Front, left, right/back TB = Front, top, right/back TC = Front, top, left/back TD = Top, left, right/back TE = Front, back, left/right TF = Front, back, top/right TG = Front, top, left/right TH = Top, back, left/right TJ = Front, back,right/left TK = Front, back, top/left TL = Front, top, right/left TM = Top, back, right/left

Zone valve X = None A = 1/2" 24VAC zone valve (09, 12) B = 3/4" 24VAC zone valve (15-36) Flow regulator X = None A = 1/2", 1.5 GPM (09, 12) B = 1/2", 2.0 GPM (09, 12) C = 1/2", 2.5 GPM (09, 12) D = 1/2", 3.0 GPM (09, 12) E = 3/4", 2.0 GPM (15, 18) F = 3/4", 2.5 GPM (15, 18) G = 3/4", 3.0 GPM (15-24) H = 3/4", 3.5 GPM (24, 30) I = 3/4", 4.0 GPM (24, 30) J = 3/4", 5.0 GPM (24-36) K = 3/4", 6.0 GPM (24-36) L = 3/4", 7.0 GPM (30, 36) M = 3/4", 8.0 GPM (30, 36) N = 3/4", 9.0 GPM (36) O = 3/4", 10.5 GPM (36) Heat exchanger 1 = Copper coax with air coil

Nomenclature

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Nomenclature VS series, cabinetry 1, 2, 3

4

5, 6

7

8

9

10

11

12, 13

14

15

16

17

18

VHC

M

09

A

A

X

S

X

DB

1

A

A

–

AA

Unit type VHC = Vertical Stack Water Source Heat Pump cabinetry

Special option codes AA = Standard

Model M = Master S = Slave A = Stand Alone

Placeholder Revision level A = Rev. 1 Supply air size X = None A = 10" x 8" (09-18) B = 12" x 10" (09, 12, 24-36) C = 14" x 12" (15, 18) D = 16" x 14" (24-36)

Nominal capacity 09 = 9,000 BTU/Hr 12 = 12,000 BTU/Hr 15 = 15,000 BTU/Hr 18 = 18,000 BTU/Hr 24 = 24,000 BTU/Hr 30 = 30,000 BTU/Hr 36 = 36,000 BTU/Hr Voltage A = 208-230V/60/1 B = 277V/60/1 Blower/motor options A = Standard/PSC B = High static/PSC C = Standard/ECM D = High static/ECM Options X = None (standard) S = With sight and sound baffle Controls S = Microprocessor controls C = Microprocessor and customer supplied DDC controls L = Microprocessor and Lon Network Communication B = Microprocessor and BACnet network communication N = Microprocessor and N2 network communication Power termination X = No disconnect 1 = Disconnect switch

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Cabinet 1 = 88" 3 = Custom Supply air/risers NA = None/back NB = None/right NC = None/left SA = Front/back SB = Right/back SC = Left/back SD = Top/back SE = Left/right SF = Front/right SG = Back/right SH = Top/right SJ = Right/left SK = Back/left SL = Front/left SM = Top/left

DA = Front, right/back DB = Front, left/back DC = Left, right/back DD = Front, top/back DE = Front, left/right DF = Back, left/right DG = Front, back/right DH = Left, top/back DJ = Back, right/left DK = Front, right/left DL = Front, back/left DM = Right, top/back DN = Front, top/left DO = Back, top/left DP = Right, top/left DQ = front, top/right DR = Back, top/right DS = Left, top/right

TA = Front, left, right/back TB = Front, top, right/back TC = Front, top, left/back TD = Top, left, right/back TE = Front, back, left/right TF = Front, back, top/right TG = Front, top, left/right TH = Top, back, left/right TJ = Front, back,right/left TK = Front, back, top/left TL = Front, top, right/left TM = Top, back, right/left

Nomenclature VS series, chassis 1, 2, 3, 4

5, 6

7

8

9

10

11

12

13

14

15

16, 17

VHCH

09

A

1

D

A

X

A

1

A

–

AA

Unit type VHCH = Vertical Stack Water Source Heat Pump chassis

Special option codes AA = Standard

Nominal capacity 09 = 9,000 BTU/Hr 12 = 12,000 BTU/Hr 15 = 15,000 BTU/Hr 18 = 18,000 BTU/Hr 24 = 24,000 BTU/Hr 30 = 30,000 BTU/Hr 36 = 36,000 BTU/Hr

Placeholder

Voltage A = 208-230V/60/1 B = 277V/60/1 Heat exhanger 1 = Copper coax with air coil Flow regulator X = None A = 1/2", 1.5 GPM (1, 2) B = 1/2", 2.0 GPM (1, 2) C = 1/2", 2.5 GPM (1, 2) D = 1/2", 3.0 GPM (1, 2) E = 3/4", 2.0 GPM (3, 4) F = 3/4", 2.5 GPM (3, 4) G = 3/4", 3.0 GPM (3, 4, 5) H = 3/4", 3.5 GPM (5, 6) I = 3/4", 4.0 GPM (5, 6) J = 3/4", 5.0 GPM (5, 6, 7) K = 3/4", 6.0 GPM (5, 6, 7) L = 3/4", 7.0 GPM (6, 7) M = 3/4", 8.0 GPM (6, 7) N = 3/4", 9.0 GPM (7) O = 3/4", 10.5 GPM (7)

Revision level A = Rev. 1 Air filter 1 = Washable 2 = 1" throwaway Hose kit (3') X = None A = 1/2" B = 3/4" Y strainer X = None A = 1/2" Y strainer (09, 12) B = 3/4" Y straner (15-36) Zone valve X = None A = 1/2" 24VAC zone valve (09, 12) B = 3/4" 24VAC zone valve (15-36)

Nomenclature

9

Unit air flow arrangements No Supply Openings

Back Supply

Drain

Return

NA

Risers

Left

Right

NC

NB

SC

SA

SB

SG

SE

SF

SL

SJ

SK

DB

DC

DA

DF

DG

DE

DK

DL

DJ

Single Supply

Cabinet

Front

Side (Left and Right) Left

Right

Return

Supply

Supply

Return

Drain

Cabinet

Drain

Double Supply

Front

Supply air to room Return air from room

Notes: Supply air grilles can be on any side except the riser side. „„ Return air location also denotes the control location and „„

service access, which is always considered the front. Single discharge opening is not recommended for sizes 24, 30 „„ and 36. Triple discharge openings are not recommended for sizes 09 and 12. Refer to Riser Slot Arrangements on page 46 for actual layout „„ dimensions.

10

Triple Supply TA

TC

TB

General data Size

09

12

15

18

24

30

36

Cooling capacity (BTU/hr)

9200

12000

16500

18500

22500

30000

34000

Heating capacity (BTU/hr)

12500

16000

21500

23500

29500

37000

41000

Compressor (1 each)

Rotary

Rotary

Rotary

Rotary

Rotary

Rotary

Scroll

27.5

31.7

45.8

47.0

52.9

70.7

60.0

2

2

2

2

2

2

2

7.1 x 6.7

7.1 x 6.7

7.1 x 6.7

7.1 x 6.7

9.2 x 10.0

9.2 x 10.0

9.2 x 10.0

360

420

540

630

820

1080

1220

Water connection size (female NPT, in.)

1/2

1/2

3/4

3/4

3/4

3/4

3/4

Condensate connection size (in.)

3/4

3/4

3/4

3/4

3/4

3/4

3/4

Total face area (ft.)

1.48

1.48

1.81

1.81

1.72

1.72

1.72

Tube size (in.)

3/8

3/8

3/8

3/8

3/8

3/8

3/8

Fin spacing (FPI)

14

14

14

14

12

12

12

Number of rows

2

3

4

4

3

4

4

Depth (in.)

18

18

18

18

24

24

24

Height (in.)

88

88

88

88

88

88

88

Factory refrigerant charge R-410A (oz) Fan data Speeds Blower wheel size (D x W) (in.) standard/high static Air flow (CFM @ 0.0" of static pressure) Water/condensate side data

Air coil data

Cabinet data

Width (in.)

18

18

18

18

24

24

24

14-1/4 x 18-1/2

14-1/4 x 18-1/2

14-1/4 x 22-1/2

14-1/4 x 22-1/2

19 x 28-3/4

19 x 28-3/4

19 x 28-3/4

Cabinet weight (lb.)

120

120

120

120

170

170

170

Chassis weight (lb.)

99

105

119

122

187

198

225

Filter standards - washable filter (in.)

Notes: Air flow at high speed and operation at lower voltage (208V) of dual voltage ratings. „„

Data and ratings

11

AHRI approved standard ratings

Water loop heat pump Total cooling at 86 °F Size

English (IP) units

09

All ratings based on AHRI/ASHRAE/ISO 13256-1 specifications

12 15

Capacity (BTU/hr)

EER (BTU/W)

9200

Total heating at 68 °F Capacity (BTU/hr)

COP

13.5

12500

4.7

12000

13.0

16000

4.6

16500

13.0

21500

4.5

18

18500

13.0

23500

4.5

24

22500

13.0

29500

4.7

30

30000

12.7

37000

4.5

36

34000

13.0

41000

4.5

Ground water heat pump Total cooling at 59 °F Size

Capacity (BTU/hr)

EER (BTU/W)

Total heating at 50 °F Capacity (BTU/hr)

COP

09

11200

21.0

10500

4.1

12

14800

21.0

13500

4.0

15

19500

20.0

18500

3.9

18

20500

19.5

19500

3.9

24

26800

20.0

24500

4.2

30

35000

19.0

32000

4.0

36

38000

19.0

35000

4.0

Ground loop heat pump Total cooling at 77 °F Size

Capacity (BTU/hr)

EER (BTU/W)

Total heating at 32 °F Capacity (BTU/hr)

09

9700

15.6

8100

3.4

12

13200

15.5

10000

3.3

15

18000

15.0

15000

3.2

18

19000

14.8

16800

3.2

24

24000

15.0

19000

3.3

30

32000

14.5

25000

3.3

36

36000

15.0

27000

3.2

Notes: Cooling capacity based upon 80.6 °F DB, 66.2 °F WB entering air „„ temperature.

Heating capacity based upon 68 °F DB, 59 °F WB entering air „„ temperature.

All ratings based upon air flow at high speed and operation at lower „„ voltage (208V) of dual voltage ratings.

12

COP

AHRI approved standard ratings Metric (SI) units All ratings based on AHRI/ASHRAE/ISO 13256-1 specifications

Water loop heat pump Total cooling at 30 °C Size

Capacity (W)

EER (BTU/W)

Total heating at 20 °C Capacity (W)

COP

09

2696

4.0

3663

4.7

12

3429

3.8

4689

4.6

15

1836

3.8

6301

4.5

18

5275

3.8

6887

4.5

24

6594

3.8

8646

4.7

30

8353

3.7

10844

4.5

36

9584

3.8

12016

4.5

Ground water heat pump Total cooling at 15 °C Size

Capacity (W)

EER (BTU/W)

Total heating at 10 °C Capacity (W)

COP

09

3282

6.2

3077

4.1

12

4337

6.2

3956

4.0

15

5715

5.9

5422

3.9

18

6008

5.7

5715

3.9

24

7854

5.9

7180

4.2

30

10257

5.6

9378

4.0

36

11137

5.6

10257

4.0

Ground loop heat pump Total cooling at 25 °C Size

Capacity (W)

EER (BTU/W)

09

2843

4.6

Total heating at 0 °C Capacity (W)

COP

2374

3.4

12

3868

4.5

2931

3.3

15

5275

4.4

4396

3.2

18

5568

4.3

4924

3.2

24

7034

4.4

5568

3.3

30

9378

4.2

7327

3.3

36

10550

4.4

7913

3.2

Notes: Cooling capacity based upon 27 °C DB, 19 °C WB entering air „„ temperature. Heating capacity based upon 20 °C DB, 15 °C WB entering air „„ temperature.

All ratings based upon air flow at high speed and operation at lower „„ voltage (208V) of dual voltage ratings.

Data and ratings

13

AHRI approved standard ratings

Size

VS series octave band sound power level dB re 1pW

Unit test operation mode

125

250

500

1000

2000

4000

8000

52.3

50.5

46.0

41.1

33.6

32.1

31.0

Fan only: high speed

52.9

51.0

47.4

41.5

33.9

32.8

31.1

Cooling: low speed

53.5

51.5

47.6

41.7

34.4

32.9

31.1

Cooling: high speed

56.5

54.3

50.1

44.3

37.9

36.3

31.8

Heating: low speed

53.9

51.0

48.4

42.4

34.9

33.2

33.1

Heating: high speed

56.2

53.8

50.2

44.2

37.5

36.3

32.8

Fan only: low speed

09

12

15

18

24

30

36

With single supply double deflection grille with standard perimeter bypass Allen lock, removable

Fan only: low speed

54.8

52.3

40.1

43.3

37.5

36.5

32.7

Fan only: high speed

54.4

52.1

37.6

43.4

36.9

38.6

32.2

Cooling: low speed

56.0

53.3

49.6

43.9

38.3

36.6

32.8

Cooling: high speed

58.0

55.4

41.7

46.2

40.9

39.2

34.2

Heating: low speed

60.9

54.2

49.9

44.2

37.6

36.4

33.8

Heating: high speed

60.7

56.2

51.7

45.8

39.6

38.6

34.4 38.4

Fan only: low speed

58.9

57.8

54.0

51.5

45.0

43.7

Fan only: high speed

59.2

59.1

54.3

52.6

45.2

44.7

41.3

Cooling: low speed

60.1

58.8

55.6

52.1

45.8

44.5

38.6

Cooling: high speed

62.8

62.4

58.2

55.4

49.1

48.1

41.8

Heating: low speed

61.3

59.3

56.4

52.3

45.4

44.1

39.1

Heating: high speed

63.8

62.3

58.1

55.2

48.4

47.7

41.7

Fan only: low speed

62.0

60.9

55.9

54.9

48.3

47.4

42.1

Fan only: high speed

61.6

60.9

55.4

53.6

47.8

47.0

44.2

Cooling: low speed

63.3

61.9

57.4

55.5

49.1

48.2

42.3

Cooling: high speed

65.1

64.1

59.4

57.5

51.3

50.5

44.8

Heating: low speed

63.8

61.9

57.9

55.1

48.3

47.1

42.0

Heating: high speed

65.1

63.9

59.4

57.5

50.3

49.2

43.7

Fan only: low speed

60.7

58.6

54.1

48.3

42.3

38.4

35.7

Fan only: high speed

59.6

58.7

54.8

49.2

43.1

39.2

36.9

Cooling: low speed

61.9

59.6

55.7

48.9

43.1

39.2

35.9

Cooling: high speed

63.1

62.0

58.9

52.0

47.1

43.0

37.5

Heating: low speed

63.7

60.8

57.9

51.1

44.8

40.5

38.4

Heating: high speed

65.7

63.2

59.4

52.3

48.7

44.1

39.6

Fan only: low speed

67.4

63.7

58.8

54.3

49.9

45.7

41.3

Fan only: high speed

65.2

64.2

58.7

55.8

50.4

46.9

44.0

Cooling: low speed

68.6

64.8

60.2

54.8

50.7

46.6

41.5

Cooling: high speed

68.8

67.4

63.0

58.5

54.2

50.3

44.5

Heating: low speed

69.7

65.7

61.2

56.1

51.9

47.8

41.9

Heating: high speed

68.7

67.7

63.2

58.6

54.4

50.3

44.8

Fan only: low speed

70.2

68.0

62.1

59.1

56.6

50.1

45.1

Fan only: high speed

70.3

68.1

63.2

65.3

56.6

50.3

46.8 45.2

Cooling: low speed

71.4

68.6

62.1

59.4

56.7

50.4

Cooling: high speed

71.5

69.8

64.0

65.4

56.2

52.1

47.0

Heating: low speed

69.9

68.3

63.0

60.1

58.5

51.3

45.8

Heating: high speed

70.5

69.6

64.0

60.9

58.8

53.0

47.7

Notes: All performance is sound power level in dB referenced to one „„ picoWatt. Data is based on sound measurements made in a reverberant room „„ on representative units from each cabinet size in accordance with AHRI Standard 350-08.

14

Electrical data Standard PSC motors Size 09 12 15 18 24 30 36

Compressor

Voltage code

Rated voltage (V/Hz/Ph)

Voltage min./max.

RLA

LRA

Power (W)

FLA

Total unit FLA

Min. circuit Max. fuse/ Amps HACR size

A

208-230/60/1

197/254

4.7

20.0

37

0.44

5.1

6.3

15

B

277/60/1

250/293

3.3

18.8

40

0.40

3.7

4.5

15

A

208-230/60/1

197/254

6.3

27.0

46

0.44

6.7

8.3

15

B

277/60/1

250/293

4.6

20.0

50

0.40

5.0

6.2

15

A

208-230/60/1

197/254

9.9

42.0

87

1.30

11.2

13.7

25

B

277/60/1

250/293

7.1

43.0

100

1.30

8.4

10.2

20

A

208-230/60/1

197/254

9.9

42.0

111

1.30

11.2

13.7

25

B

277/60/1

250/293

9.0

54.0

125

1.30

10.3

12.6

20

A

208-230/60/1

197/254

10.8

46.0

304

2.10

12.9

15.6

25

B

277/60/1

250/293

10.9

60.0

300

1.30

12.2

14.9

25

A

208-230/60/1

197/254

13.1

65.9

368

2.10

15.2

18.5

30

B

277/60/1

250/293

12.2

72.0

340

1.30

13.5

16.6

30

A

208-230/60/1

197/254

18.6

79.0

442

2.10

20.7

25.4

40

B

277/60/1

250/293

16.0

87.0

360

1.30

17.3

21.3

40

Standard EC motors Size 09 12 15 18 24 30 36

Voltage code

Rated voltage Voltage min./ (V/Hz/Ph) max.

Compressor RLA

LRA

FLA

Total unit FLA

Min. circuit Amps

Max. fuse/ HACR size

A

208-230/60/1

197/254

4.7

20.0

2.9/2.6

7.6/7.3

8.8/8.5

15

B

277/60/1

250/293

3.3

18.8

2.5

5.8

6.6

15

A

208-230/60/1

197/254

6.3

27.0

2.9/2.6

9.2/8.9

10.8/10.5

20

B

277/60/1

250/293

4.6

20.0

2.5

7.1

8.3

15

A

208-230/60/1

197/254

9.9

42.0

2.9/2.6

12.8/12.5

15.3/15.0

25

B

277/60/1

250/293

7.1

43.0

2.5

9.6

11.4

20

A

208-230/60/1

197/254

9.9

42.0

2.9/2.6

12.8/12.5

15.3/15.0

25

B

277/60/1

250/293

9.0

54.0

2.5

11.5

13.8

25

A

208-230/60/1

197/254

10.8

46.0

2.9/2.6

13.7/13.4

16.4/16.1

25

B

277/60/1

250/293

10.9

60.0

2.5

13.4

16.1

25

A

208-230/60/1

197/254

13.1

65.9

2.9/2.6

16.0/15.7

19.3/19.0

30

B

277/60/1

250/293

12.2

72.0

2.5

14.7

17.8

30

A

208-230/60/1

197/254

18.6

79.0

2.9/2.6

21.5/21.2

26.2/25.9

50

B

277/60/1

250/293

16.0

87.0

2.5

18.5

22.5

40

Data and ratings

15

Electrical data High static PSC motors Size 9 12 15 18 24 30 36

Voltage Rated voltage code (V/Hz/Ph)

Compressor

Voltage min./max.

RLA

LRA

Power (W)

FLA

Total unit FLA

Min. circuit Amps

Max. fuse/ HACR size

A

208-230/60/1

197/254

4.7

20.0

79

1.3

6.0

7.2

15

B

277/60/1

250/293

3.3

18.8

80

1.3

4.6

5.4

15

A

208-230/60/1

197/254

6.3

27.0

102

1.3

7.6

9.2

15

B

277/60/1

250/293

4.6

20.0

120

1.3

5.9

7.1

15

A

208-230/60/1

197/254

9.9

42.0

155

3.2

13.1

15.6

25

B

277/60/1

250/293

7.1

43.0

170

2.9

10.0

11.8

20

A

208-230/60/1

197/254

9.9

42.0

199

3.2

13.1

15.6

25

B

277/60/1

250/293

9.0

54.0

210

2.9

11.9

14.2

25

A

208-230/60/1

197/254

10.8

46.0

450

3.4

14.2

16.9

30

B

277/60/1

250/293

10.9

60.0

450

2.9

13.8

16.5

25

A

208-230/60/1

197/254

13.1

65.9

560

3.4

16.5

19.8

30

B

277/60/1

250/293

12.2

72.0

560

2.9

15.1

18.2

30

A

208-230/60/1

197/254

18.6

79.0

650

3.4

22.0

26.7

50

B

277/60/1

250/293

16.0

87.0

650

2.9

18.9

22.9

40

High static EC motors Size 9 12 15 18 24 30 36

16

Voltage Rated voltage Voltage min./ code (V/Hz/Ph) max.

Compressor RLA

LRA

FLA

Total unit FLA

Min. circuit Amps

Max. fuse/ HACR size

A

208-230/60/1

197/254

4.7

20.0

2.9/2.6

7.6/7.3

8.8/8.5

15

B

277/60/1

250/293

3.3

18.8

2.5

5.8

6.6

15

A

208-230/60/1

197/254

6.3

27.0

2.9/2.6

9.2/8.9

10.8/10.5

20

B

277/60/1

250/293

4.6

20.0

2.5

7.1

8.3

15

A

208-230/60/1

197/254

9.9

42.0

8.1/7.3

18.0/17.2

20.5/19.7

30

B

277/60/1

250/293

7.1

43.0

5.5

12.6

14.4

20

A

208-230/60/1

197/254

9.9

42.0

8.1/7.3

18.0/17.2

20.5/19.7

30

B

277/60/1

250/293

9.0

54.0

5.5

14.5

16.8

25

A

208-230/60/1

197/254

10.8

46.0

8.1/7.3

18.9/18.1

21.6/20.8

30

B

277/60/1

250/293

10.9

60.0

5.5

16.4

19.1

30

A

208-230/60/1

197/254

13.1

65.9

8.1/7.3

21.2/20.4

24.5/23.7

40

B

277/60/1

250/293

12.2

72.0

5.5

17.7

20.8

30

A

208-230/60/1

197/254

18.6

79.0

8.1/7.3

26.7/25.9

31.4/30.6

50

B

277/60/1

250/293

16.0

87.0

5.5

21.5

25.5

40

Standard 24VAC sequence of operation Random start delay

be valid the reversing valve will energize/de-energize

When the unit is first powered “on” the control microprocessor will generate a random number to determine the start delay of the compressor operation (3-5 minutes). This delay is used to prevent multiple units from cycling “on” at the same time. The purpose is to prevent a large power load on the building electrical system after a power outage. After the number, or delay time, is generated the microprocessor will use it to determine the minimum amount of time delay before the compressor is cycled “on” after a demand is received from the thermostat.

after 5 seconds. The microprocessor will then verify that the anti-short cycling delay has been satisfied. Once the anti-short cycling delay has been satisfied the compressor will cycle “on.” The blower will cycle “on” in high speed 15 seconds after the compressor is cycled “on.”

Anti-short cycling delay After the random start delay is generated the microprocessor will use it to determine the minimum amount of delay before the compressor is cycled “on” after a demand is received from the thermostat. This allows the refrigerant system to equalize in pressure and prevents short-cycling of the compressor.

Minimum compressor runtime The minimum compressor runtime of each cycle, heating or cooling, is 90 seconds. Once the compressor is energized it will not de-energize until the minimum runtime is satisfied, even if the thermostat input is removed.

Cooling 1st stage (Y1, O) When the microprocessor receives (Y1, O) at the 24VAC thermostat input connection, the unit will proceed with the cooling 1st stage sequence. The microprocessor must receive these signals for 2 continuous seconds before it recognizes the inputs as valid. Once the input signals are determined to be valid the reversing valve will energize/de-energize after 5 seconds. The microprocessor will then verify that the anti-short cycling delay has been satisfied. Once the anti-short cycling delay has been satisfied the compressor will cycle “on.” The blower will cycle “on” in low speed 15 seconds after the compressor is cycled “on.”

Cooling 2nd stage (Y1, Y2, O) When the microprocessor receives (Y1, Y2, O) at the 24VAC thermostat input connection, the unit will proceed with the cooling 2nd stage sequence. The microprocessor must receive these signals for 2 continuous seconds before it recognizes the inputs as valid. Once the input signals are determined to

Heating 1st stage (Y1) When the microprocessor receives (Y1) at the 24VAC thermostat input connection, the unit will proceed with the cooling 1st stage sequence. The microprocessor must receive these signals for 2 continuous seconds before it recognizes the inputs as valid. Once the input signals are determined to be valid the reversing valve will enertize/de-energize after 5 seconds. The microprocessor will then verify that the anti-short cycling delay has been satisfied. Once the anti-short cycling delay has been satisfied the compressor will cycle “on.” The blower will cycle “on” in low speed 15 seconds after the compressor is cycled “on.”

Heating 2nd stage (Y1, Y2) When the microprocessor receives (Y1, Y2) at the 24VAC thermostat input connection the unit will proceed with the heating 2nd stage sequence. The microprocessor must receive these signals for 2 continuous seconds before it recognizes the inputs as valid. Once the input signals are determined to be valid the reversing valve will energize/de-energize after 5 seconds. The microprocessor will then verify that the anti-short cycling delay has been satisfied. Once the anti-short cycling delay has been satisfied the compressor will cycle “on.” The blower will cycle “on” in high speed 15 seconds after the compressor is cycled “on.”

Fan only mode (G) The fan only mode can only be used with a 24VAC thermostat and will energize the low speed blower when a (G) input has been received at the 24VAC thermostat input connection. When the input is removed the blower will de-energize immediately.

24 volt thermostats Non-programmable and programmable thermostats use a control algorithm that uses both time and temperature difference from the setting to determine when to turn on stage 1 fan speed (low) and stage 2 fan speed (high). This logic therefore controls the room temperature to plus or minus 1 degree from set point.

Sequence of operation

17

System piping arrangements

Direct return Flush/vent loop

Capped risers

Shown to the right are some of the common piping layouts for the Zehnder Rittling Vertical Stack Water Source Heat Pumps. Regardless of the system selected, optimum performance can only be achieved through adjustment of the water flow at each individual unit. Direct return This system is the most common piping arrangement referred to as “Direct Return.” This is the most cost effective method of piping to install since the water is supplied and returned to a riser column at the same place, at the bottom or top of the building. However, this type of system requires more effort to individually balance water flow to the units. The risers are normally capped at the ends opposite the main supply and return piping and may require a field installed flush and vent loop. Reverse return with individual return This system is a “Reverse Return” system, which is commonly used to minimize individual unit water flow balancing and is often referred to as “self balancing.” This riser arrangement has a natural affinity to balance the flow to each unit in the riser column. However, individual unit balancing may still be required. This piping system has an individual return for each riser column. Reverse return with common return This system is a “Reverse Return” with a common reverse return riser installed separately from the individual unit riser columns. This riser arrangement allows for more flexibility in individual unit riser sizing but has the same general characteristics as the “reverse return” system described above. It may also be a better fit for the particular structural and architectural requirements of the building.

Roof

3rd floor

2nd floor

1st floor S R

Mains Basement

Reverse return with individual return Roof

3rd floor

2nd floor

S R

1st floor Mains Basement

Reverse return with common return Roof

3rd floor

2nd floor

1st floor S

R Basement

18

Riser material, sizing, installation and expansion

The Friction Loss for Risers Table displays riser tube diameter sizes as a function of flow (GPM), friction loss and water velocity. For maximum riser velocity on pressure drop per 100 feet, refer to ASHRAE 2005 Fundamentals 36.6 Figure 5 for riser sizing. Generally, riser copper type, size, length and insulation thickness are determined by the location of the heat pump unit in the building. Water and condensate risers are available in type M or Type L copper, varying diameters from 3/4" to 2 1/2", and with either 1/2" or 3/4" thick closed cell foam insulation. All factory supplied risers and riser extensions are insulated for the full length of the riser, eliminating the need for field insulation. Any concerns regarding excessive expansion and between-the-floor fireproofing have not been addressed in the Zehnder Rittling design and any additional materials to accommodate these concerns are to be field supplied and installed using proper building practices and local building codes. Riser sizing is generally based on the water flow requirements of each unit and the units on higher and lower floors that tie into the same riser column depending on the piping system chosen. Water piping is often designed at approximately 4-5 ft/s for system economy, consistent with minimizing riser erosion and

Friction loss for risers 6f

t/s

inc h

10 9 8 7 6

5f

¾

nc

h

t/s

t/s

2 Pipe size Water velocity (feet per second)

1

h 2½

t/s

inc

3f

2i

3

nc h

1½

4

4f

inc

1¼

5

h

inc h

1i

Pressure drop: ft. water/100 ft. of riser

15

3

4

5

6

7 8 9 10

2f

noise. Keeping this in mind, risers can be reduced in size as the water flow decreases from floor to floor. For low-rise buildings, riser sizes can be of a single diameter. The reduced material handling on site will often offset extra costs associated with larger risers. Generally, in medium to high-rise buildings, allowances must be made for pipe expansion. Vertical Stack Water Source Heat Pump units are furnished with integral copper expansion loops that allow up to 1" of riser expansion and contraction. Additional expansion compensation must be made in the riser system in the field where movement is expected to exceed factory allowances. The table showing allowable riser lengths between system expansion loops displays expansion characteristics of risers compared to water temperature differential. Assuming a hot water temperature of 150 °F and 45 °F chilled water, the temperature difference of 105 °F indicates 95 feet of riser will expand or contract 1". To eliminate stress, a riser system must be anchored to the building structure at least once. Technical information on pipe expansion, contraction and anchoring can be found in the ASHRAE HVAC Systems and Equipment Handbook and various other technical publications. Riser expansion and anchoring is the responsibility of the design engineer and installing contractor.

Allowable riser lengths between system expansion loops 550

Riser length for 1 inch and 1½ inch expansion: ft.

Some of the factors affecting riser application and sizing are noise, tube erosion and economics. Since each Vertical Stack Water Source Heat Pump unit may be supplied with factory installed risers, the riser material, diameter, length and insulation thickness must be determined for each unit based on its positioning within the building.

1½ inch pipe size

500

1 inch pipe size

450 400 350 300 250 200 150 100 50

t/s

0

20

30

Water flow rate: GPM

40

50 60 70 80 100

20

40

60

80

100

120

140

160

Water temperature difference: °F

Piping and risers

19

Dimensions and data: Stand alone unit (VHNA) Dimensional data Unit dimensions: 88" height

2-1/2" M L

H

A

Optional duct connection

Top view 1-5/8"

2-1/8"

N 3-1/4"

2-5/16" A

Dimension

Models 09-18

Models 24-36

A

18"

24-1/4"

B

8"

10"

C

12"

14"

D

10"

12"

E

14"

16"

F

54-11/16"

55-1/2"

G

5-9/16"

5-5/8"

H

2-1/16"

4-1/8"

I

4-1/16"

6-1/8"

J

1-15/16"

4-1/16"

K

3-5/16"

6-1/16"

L

1-1/4"

1-7/16"

M

3-1/4"

3-7/16"

N

4-3/4"

8-13/16"

K Return I H

Swage

1" 3"

Knockout dimensions typical for all

E D

C B

F

65-5/16"

Filter

Return air opening

2-11/16" Control box access panel Air coil Motor/blower assembly

88"

Optional disconnect switch location

Control box

Optional auto flow regulator location (return side) Optional water valve location (supply side)

57-1/8"

2-1/4"

Optional 24V thermostat location

Risers

Hose kits

39-1/2"

2-3/8"

2-7/8"

Air coil drain pan

G

Chassis

Condensate drain pan Factory-installed P-trap

Front view * Supply grille rough-in dimensions 20

3"

J

Supply

Right view

104" - 115"

Condensate drain

Dimensions and data: Master (VHNM) Dimensional data Unit dimensions: 88" height

3"

2-1/2" M L

Dimension

Models 09-18

Models 24-36

A

18"

24-1/4"

B

8"

10"

C

12"

14"

D

10"

12"

E

14"

16"

F

54-11/16"

55-1/2"

G

5-9/16"

5-5/8"

H

2-1/16"

4-1/8"

I

4-1/16"

6-1/8"

J

1-15/16"

4-1/16"

K

3-5/16"

6-1/16"

L

1-1/4"

1-7/16"

M

3-1/4"

3-7/16"

N

4-3/4"

8-13/16"

H

A

Optional duct connection

Top view 1-5/8"

2-1/8"

N 3-1/4"

2-5/16" A

K Return I H

Swage

1" 3"

Knockout dimensions typical for all

E D

C B

F

Return air opening

Control box access panel Air coil Motor/blower assembly Optional auto flow regulator location (return side) Optional water valve location (supply side) Hose kits

2-7/8"

Air coil drain pan Chassis G

65-5/16"

Filter

2-11/16"

88"

Optional disconnect switch location

Control box

57-1/8"

2-1/4"

Optional 24V thermostat location

Risers

39-1/2"

2-3/8"

3"

J

Supply

104" - 115"

Condensate drain

Condensate drain pan Factory-installed P-trap

Front view

Right view

* Supply grille rough-in dimensions Dimensions and data

21

Dimensions and data: Slave (VHNS) Dimensional data Unit dimensions: 88" height M L

H

A

Optional duct connection

2-1/8"

Reference only: Field piping to master by others. Ensure master and slave are connected supply-to-supply and return-to-return

1-5/8" N

Master

2-5/16"

Slave

A

Top view

3-1/4"

Return Condensate Supply

Supply Condensate Return

Dimension

Models 09-18

Models 24-36

A

18"

24-1/4"

B

8"

10"

C

12"

14"

D

10"

12"

E

14"

16"

F

54-11/16"

55-1/2"

G

5-9/16"

5-5/8"

H

2-1/16"

4-1/8"

I

4-1/16"

6-1/8"

J

1-15/16"

4-1/16"

K

3-5/16"

6-1/16"

L

1-1/4"

1-7/16"

M

3-1/4"

3-7/16"

N

4-3/4"

8-13/16"

Note: Riser knockouts are 2-1/2" center to center

K J

I H

1" 3"

Knockout dimensions typical for all

E D

C B

F

65-5/16"

Filter

Return air opening

2-11/16" Control box access panel Air coil Motor/blower assembly

88"

Optional disconnect switch location

Control box

Optional auto flow regulator location (return side) Optional water valve location (supply side)

57-1/8"

2-1/4"

Optional 24V thermostat location

Hose kits

39-1/2"

2-3/8"

2-7/8"

Air coil drain pan

G

Chassis

Condensate drain pan Factory-installed P-trap

Front view * Supply grille rough-in dimensions

22

Right view

Dimensions and data: Chassis

Dimensional data Unit size Small unit 09-12 Small unit 15-18 Large unit 24-36

A 16-1/32" 22-1/32"

B 37" 44" 46"

C 16-3/32" 23"

A

A

B

B

A

C

C

B

Dimensions and data

23

Hose kit Specifications: Designed for VS series applications. „„ Temperature range of 35 °F (2 °C) to „„ 180 °F (82 °C). Maximum working pressure of „„ 400 psig (2756 kPa). Fire rated materials per ASTM E 84-00 „„ (NFPA 255, ANSI/UL 723 and UBC 8-1). Kevlar® reinforced EPDM core with „„ ANSI 302-304 stainless steel outer braid. Swivel connector(s) with NPSH at „„ both ends. EPDM gasket, shipped inside connection. Two ball valves supplied with each „„ hose kit

Stainless steel ferrule Sweat connection

Brass union connection

P/T Port Shut off valve

Table 9: Physical data Unit sizes

Inside diameter inch (mm)

Length feet (cm)

Working pressure psig (kPa)

Minimum burst pressure psig (kPa)

Minimum bend radius inch (mm)

09, 12

1/2 (10.7)

3 (91)

400 (2756)

1600 (11024)

2-5/8 (66.7)

15, 18, 24, 30, 36

3/4 (19.1)

3 (91)

400 (2756

1600 (11024)

4-1/2 (114.3)

Notice: Do not allow hoses to rest against sharp edges or structural building components. Compressor vibration may cause hose failure and vibration transmission through the hoses to the structure, causing noise complaints.

24

Riser slot arrangements Sizes 09-18 Right side view

Left side view

Rear view (back)

Back of cabinet

Front of cabinet

43-5/16"

43-5/16"

11-17/32" 5"

2"

6-3/8"

4-3/8"

11-17/32"

2"

6-3/8"

4-3/8"

Knockout location for risers 44-21/32"

44-21/32"

9"

9"

9"

2-27/32"

2-27/32"

Knockout location for condensate drain

2-27/32"

Sizes 24-36 Right side view

Rear view (back)

Left side view

Back of cabinet

Front of cabinet

48-1/2"

48-1/2"

11-17/32"

5-1/4" 2-1/2"

2-1/2"

9-1/2"

9-1/2"

6"

11-17/32"

6"

Knockout location for risers 39-1/2"

39-1/2" 3-1/2"

3-1/2" 12"

12"

12"

3-1/2"

3-1/2"

Knockout location for condensate drain

3-1/2"

Note: Right and left are determined by facing front of cabinet. „„

Dimensions and data

25

Riser configurations

All risers capped at cabinet run-outs System piping is bottom „„ supply and return.

All risers open at top Bottom supply and return „„

piping for supplying water to other units.

Bottom supply and return „„ piping for drain vent to roof, flushing crossover.

Supply and return open, drain capped at cabinet run-out

Capped supply and return, drain open at top

Bottom supply and return „„

„„ Bottom supply and return

piping with open top for venting or flushing crossover.

Top supply and return „„

„„ Top supply and return.

All riser through slab at bottom

Supply and return capped at cabinet run-out, drain through slab

piping with open drain riser for venting to roof or picking up drain from other equipment above.

piping.

Supply or return open at top, others capped at cabinet run-out „„ Bottom supply and top return piping.

„„ Top supply and bottom return piping.

Symbols Riser piping is left open from factory Riser piping is capped from factory

Bottom supply and return. „„

„„ Top supply and

return feeding other equipment above.

„„ Top supply and return Supply & return mains „„

above these units on “between-floors” main piping.

26

All risers capped at cabinet run-out, drain through slab Isolated unit top „„

supply and return from adjacent riser with separate drain.

Check riser venting. „„

Supply or return capped at cabinet run-out, other risers extend through slab B „„  ottom supply, top return piping.

Bottom return, top „„ supply piping.

1-3/8" Floor

Standard removable perimeter return air panel 26-9/32"

32-9/32" 27-1/8"

2-15/16"

21-1/8"

63-5/32"

55-1/4"

58"

63-29/32"

2-15/16"

56"

58-3/4"

1-3/8"

1-3/8"

Floor

Floor

Available for sizes 09-18

Available for sizes 24-36

Holes to secure frame to studs (typical)

32-9/32" 27-1/8"

3

2-15/16" 2

1

63-29/32"

6

56"

58-3/4"

1-3/8" Floor Holes to secure frame to studs (typical)

4

7 5

3

Allen lock, removable 2

1

Notes: Seal between the frame and cabinet „„ with a weather serial gasket (provided with cabinet) to avoid air from being pulled in from the wall cavity. Do not attach frame to cabinet. „„ Frame support shipped with cabinet. „„ Door assemblies shipped separately. „„

6

Item Number

Description

1

Return panel

Quantity 1

2

Quarter turn fastener

1

3

Door stop

3

4

Screw

10

5

Pivot angle

2

6

Frame

1

7

Frame support

1

Dimensions and data

27

1-3/8" Floor

Optional hinged perimeter return air panel 26-9/32"

2-15/16"

21-1/8"

32 9/32" 2-15/16"

27-1/8"

63-5/32"

58"

55-1/4" 63-29/32"

56"

58-3/4"

1-3/8" Floor

1-3/8" Floor

Available for sizes 09-18

Available for sizes 24-36 Holes to secure frame to studs (typical)

32 9/32" 27-1/8"

2-15/16"

3

2

5

4 1 63-29/32"

58-3/4"

Holes to secure frame to studs 1-3/8"(typical) Floor

1 28

7

Key lock or Allen lock Item number

3 Notes: Seal between the frame and cabinet „„ 2with a weather serial gasket (provided with cabinet) to avoid air from being pulled in from the wall cavity. Do not attach frame to cabinet. „„ Frame support shipped with cabinet. „„ 4 Door assemblies shipped separately. „„

6

56"

5

6

Description

Quantity

1

Return panel

1

2

Quarter turn fastener or key lock

2

3

Door stop

2

4

Screw

12

5

Hinge

2

6

Frame

1

7

Frame support

1

29/32"

Optional removable louvered return air panel 2-15/16"

32-9/32"

2-15/16" 24-3/16"

27-1/8"

61-1/8"

58-3/4"

2-15/16"

30 3/16"

17-11/16"

61-7/8"

19-11/16"

24-29/32"

24-29/32"

1-3/8"

1-3/8"

Floor

Floor

Available for sizes 09-18

Available for sizes 24-36

Holes To Secure Frame To Studs (Typical)

2-15/16"

30 3/16"

2 3

1

61-7/8"

19-11/16"

24-29/32"

1-3/8"

Holes To Secure Frame Floor To Studs (Typical)

Notes: Seal between the frame and cabinet with „„ 2 a weather serial gasket (provided with cabinet) to avoid air from being pulled in 1from the wall cavity. Do not attach frame to cabinet. „„ Frame support shipped with cabinet. „„ Door assemblies shipped separately. „„

4

Allen lock, removable Item number

Description

Quantity

1

Return panel

1

32

Quarter turn fastener

1

3

Frame

1

4

Frame support

1

Dimensions and data

29

Aluminum discharge grille Single deflection

Individually adjustable blades

1-1/4"

5/8" B

H

1-7/8"

A

1-1/8"

W

Dimensional data Grille size

W

H

A

B

C

16" x 14"

15-15/16"

13-15/16"

17-7/8"

15-7/8"

7-15/16"

14" x 12"

13-15/16"

11-15/16"

15-7/8"

13-7/8"

6-15/16"

12" x 10"

11-15/16"

9-15/16"

13-7/8"

11-7/8"

5-15/16"

10" x 8"

9-15/16"

7-15/16"

11-7/8"

9-7/8"

4-15/16"

Supply grille arrangements Notes „„ Dimensions are in inches „„ All dimensions are +/- 1/4 „„ Discharge grilles are shipped loose for field installation „„ Construction is roll formed aluminum frame and blades „„ Standard finish is powder coated and will be the same color as the return grille „„ Mounting hardware included All listed dimensions are approximate and are subject to change without notice.

30

Unit Size

Single discharge

Double discharge

Triple discharge

09

14" x 12"

10" x 8"

10" x 8"

12

14" x 12"

10" x 8"

10" x 8"

15

14" x 12"

10" x 8"

10" x 8"

18

14" x 12"

10" x 8"

10" x 8"

24

16" x 14"

12" x 10"

12" x 10"

30

16" x 14"

12" x 10"

12" x 10"

36

16" x 14"

12" x 10"

12" x 10"

Aluminum discharge grille Double deflection

Individually adjustable blades

1-1/4"

B

H 5/8"

1-7/8"

A 3/4"

W

Dimensional data Grille size

W

H

A

B

C

16" x 14"

15-15/16"

13-15/16"

17-7/8"

15-7/8"

7-15/16"

14" x 12"

13-15/16"

11-15/16"

15-7/8"

13-7/8"

6-15/16"

12" x 10"

11-15/16"

9-15/16"

13-7/8"

11-7/8"

5-15/16"

10" x 8"

9-15/16"

7-15/16"

11-7/8"

9-7/8"

4-15/16"

Supply grille arrangements Notes „„ Dimensions are in inches „„ All dimensions are +/- 1/4 „„ Discharge grilles are shipped loose for field installation „„ Construction is roll formed aluminum frame and blades „„ Standard finish is powder coated and will be the same color as the return grille „„ Mounting hardware included All listed dimensions are approximate and are subject to change without notice.

Unit Size

Single discharge

Double discharge

Triple discharge

09

14" x 12"

10" x 8"

10" x 8"

12

14" x 12"

10" x 8"

10" x 8"

15

14" x 12"

10" x 8"

10" x 8"

18

14" x 12"

10" x 8"

10" x 8"

24

16" x 14"

12" x 10"

12" x 10"

30

16" x 14"

12" x 10"

12" x 10"

36

16" x 14"

12" x 10"

12" x 10"

Dimensions and data

31

Aluminum discharge grille

Double deflection with opposed blade damper

5/32"

Individually adjustable blades on 2/3" spacing 1-1/4"

Slide operator

C

D 5/8"

2-13/16"

A 2/3"

One piece extruded frame

B

Dimensional data

Notes

„„ Vertical blades in the front, horizontal blades in the back, both individually adjustable and on 2/3" spacing „„ Opposed blade damper with slide operator „„ Aluminum roll formed blade with semi-airfoil design „„ Pressure fit nylon pivot pins (rattle-free and non-loosening) „„ Aluminum extruded frame with mechanically locked corners „„ Countersunk screw holes complete with painted mounting screws „„ Sealing gasket to prevent streaking on walls or ceiling „„ Durable powdercoat painted finish All listed dimensions are approximate and are subject to change without notice.

32

Grille size

W

16" x 14"

15-11/16"

13-11/16" 17-11/16" 15-11/16" 7-27/32"

H

A

B

C

14" x 12"

13-11/16"

11-11/16" 15-11/16" 13-11/16" 6-27/32"

12" x 10"

11-11/16"

9-11/16"

13-11/16" 11-11/16" 5-27/32"

10" x 8"

9-11/16"

7-11/16"

11-11/16" 9-11/16"

4-27/32"

Supply grille arrangements Unit Size

Single discharge

Double discharge

Triple discharge

09

14" x 12"

10" x 8"

10" x 8"

12

14" x 12"

10" x 8"

10" x 8"

15

14" x 12"

10" x 8"

10" x 8"

18

14" x 12"

10" x 8"

10" x 8"

24

16" x 14"

12" x 10"

12" x 10"

30

16" x 14"

12" x 10"

12" x 10"

36

16" x 14"

12" x 10"

12" x 10"

Mechanical specifications Models VHNA, VHNM and VHNS General Furnish and install Vertical Stack Water Source Heat Pumps where indicated on the plans and in the specifications, with required mounting components and accessories. All units shall be capable of meeting or exceeding the scheduled capacities for cooling, heating and air delivery. Units shall be ETL certified for the United States and Canada in compliance with UL/ANSI Standard 1995 and CSA C22.2 No. 236-05, and be certified as complying with ANSI/ARI/ ASHRAE/ISO Standard 13256-1. Construction All unit cabinet panels shall be fabricated of 20-gauge galvanized steel panels. All cabinet panels shall be insulated with ½" thick 2 lb density matt-faced fiberglass [½" thick foil faced fiberglass with scrim and taped edges to prevent any fibers from reaching the airstream] [½" thick elastomeric closed cell foam insulation]. Insulation shall conform to NFPA 90A for fire, smoke and melting, and comply with a 25/50 Flame Spread and Smoke Developed Index per ASTM E-84 or UL 723. Additionally, insulation shall comply with Antimicrobial Performance Rating of 0, no observed growth, per ASTM G-21. All unit panels shall have knockouts for supply air openings and riser slots to facilitate the field conversion of riser location and supply air grille location.

The removable perimeter bypass with Allen lock [hinged perimeter bypass with Allen lock] [hinged perimeter bypass with key lock] [removable perimeter bypass with Allen lock] [removable louvered with Allen lock] front access panel shall be fabricated of not less than 18-gauge [16-gauge] [14-gauge] cold rolled steel. The front panel mounts within a frame that is flush with the wall. A front panel that protrudes from the wall is not acceptable. „„ Option: Provide an architectural

grade double deflection [single deflection] [double deflection opposed blade damper] aluminum discharge grille. Painted finish All front return panels, mounting frames and supply air grilles shall be finished with a standard ivory epoxy powder coat paint. Optional colors can be selected from the Zehnder Rittling Color Chart. Liquid coat paint shall not be acceptable. Custom colors are also available with the submission of a color chip for color match.

The fan/motor assembly shall be constructed of 18-gauge galvannealed steel and installed in a z-channel mounting frame for ease of sliding fan/motor deck in and out through the front panel. Each fan/motor assembly shall be fastened by no more than 2 screws. The motor shall have a quick connect to allow service and removal without the need for tools.

„„ Option: For units with multiple

outlets, include a sheet metal baffle, insulated on 2 sides, inside the discharge plenum to break the sight lines between the two discharge outlets and to attenuate room noise that could be transmitted through the openings. Power Units shall not exceed scheduled power consumption.

„„ Option: Supply air opening

knockouts shall be factory sealed and left in place during shipping and staging at the job site.

centrifugal type constructed of galvanized steel for corrosion resistance. Motors shall be 208-230V/60Hz/1Ph [277V/60Hz/1Ph] permanent split-capacitor [electronically commutated high-efficiency, programmable brushless DC], totally enclosed, tap wound for 2-speed, permanently lubricated sleeve bearing, type with automatic reset integral thermal overload protection and resiliently mounted. High static motors are available for ducted applications. Shaded pole motors are not acceptable. Single speed motors are not acceptable. Prior to shipping, all motors shall be assembled, factory tested and installed in the unit

Fan and motor Unit fan shall be dynamically balanced, forward curved, DWDI

Chassis The chassis consists of a compressor, complete refrigeration and water piping circuits, copper coaxial heat exchanger and incorporates a coated hydrophilic aluminum air coil for enhanced condensate drainage. A rotary or scroll compressor utilizes R-410A refrigerant. All units are equipped with two drop down service legs to support the chassis when testing or servicing is required. All units feature wheels on the

Mechanical specifications

33

Mechanical specifications Models VHNA, VHNM and VHNS

bottom of the chassis that allow for easy installation and removal during installation or servicing. Front facing refrigerant test ports are accessible without removing the chassis. Drain pan Primary condensate drain pans shall be single wall, 20-gauge stainless steel for superior corrosion resistance. Drain pans shall be of one piece construction and be positively sloped in 2 directions for condensate removal. An easily removable rubber p-trap shall be furnished, factory piped to the condensate drain riser, held in place by 2 compression clamps. A condensate level sensor is provided to eliminate power to unit if drain pan becomes clogged. The primary drain pan shall be externally insulated with elastomeric closed cell foam insulation. The insulation shall carry no more than a 25/50 Flame Spread and Smoke Developed Rating per ASTM E-84 and UL 723 and an Antimicrobial Performance Rating of 0, no observed growth, per ASTM G-21. Internally sprayed insulation will not be acceptable. Coils The air coil shall optimize rows to meet the specified capacity. Coils shall have 3/8" OD seamless copper tubes and shall be mechanically expanded to provide an efficient, permanent bond between the tube and aluminum fin. Minimum copper tube thickness shall be 0.012". Fins shall have high efficiency aluminum surface optimized for heat transfer, air pressure drop and carryover. Minimum fin thickness shall be 0.0045". Lanced fins shall not be acceptable.

34

All coils shall be tested at 300 PSIG with helium and rated for a maximum 600 PSIG working pressure. Coil casing shall be fabricated from galvanized steel [stainless steel]. Filters All units shall be furnished with a washable nylon type filter [1" nominal glass fiber throwaway] filter. Filters are held in place by four (4) filter clips and shall be tight fitting to prevent air bypass. Electrical Units shall be furnished with single point power connection. All electrical terminations to be made in terminal strip. The factory mounted terminal wiring strip consists of a multiple position screw terminal block to facilitate wiring terminations for the electric control valve and thermostat. The control box shall contain a 50VA transformer, 24V secondary voltage with 2A low voltage circuit breaker, 2-pole compressor contactor and microprocessor controller. The reversing valve, fan motor and unit safety controls wiring shall be connected to the microprocessor for unit operation and monitoring. The units shall be name-plated for use with time delay fuses or HACR circuit breakers. The unit controls shall be 24V and provide heating or cooling as required by the remote thermostat. The microprocessor can accept either a standard 24V digital, non-programmable thermostat [digital, programmable thermostat] [digitally communicating thermostat with IR remote control operation]

Mechanical specifications Models VHNA, VHNM and VHNS

designed to control up to two independently energized fan speeds. Thermostat will be provided with wiring harness complete with quick connect and pre-wired to terminal blocks. „„ Option: Provide a service

disconnect switch to isolate power from the unit during maintenance. Primary internal wiring and testing shall be conducted at the factory. All units shall be shipped with wiring diagrams.

Piping packages shall be completely factory assembled including interconnecting pipe and factory tested for leaks. Risers Furnish chilled and hot water supply and return risers mounted to the unit. Risers shall be Type-M seamless copper tube and include 3" deep swaged connections at the top for connection to the unit above. Slip couplings are not acceptable. „„ Option: Provide Type-L copper

risers that meet or exceed the requirements stated above.

Hose kits „„ Option: Provide a standard

factory assembled and mounted ½” [3/4”] 2-way, on/ off, 24V normally closed zone valve. Control valve shall be wired to terminal blocks through quick connect to allow service and replacement of valves. Maximum entering water temperature on the control valve shall be 200°F, and maximum operating pressure shall be 300 PSIG. „„ Option: Piping packages shall include stainless steel braided hoses to allow for thermal expansion within the unit cabinet. The hose shall be EPDM inner lined and Kevlar® reinforced, with stainless steel FNPT swivels and/or fittings. The hoses shall be rated for a maximum 450 PSIG working pressure at 250°F, and shall conform to NFPA 90A and carry no more than a 25/50 Flame Spread and Smoke Developed Rating, per ASTM E-84 and UL 723. „„ Option: Provide a y-strainer with pressure-temperature ports (P/T) on supply line. „„ Option: Provide a fixed flow control device with pressuretemperature ports (P/T) on return line.

Risers shall be insulated with ½" closed cell foam insulation covering the entire riser. Insulation shall conform to NFPA 90A and carry no more than a 25/50 Flame Spread and Smoke Developed Rating, per ASTM E-84 and UL 723. „„ Option: Provide ¾" closed cell

foam insulation that meets or exceeds the requirements stated above. „„ Option: Risers to be provided without insulation. Condensate drain risers shall be Type-M seamless copper tube and meet the requirements stated above. „„ Option: Risers shall be factory

fabricated, bundled, and tagged separate from the heat pump units, allowing for shipment and installation of risers prior to the heat pumps. Units shall be manufactured in accordance with ISO 9001:2008 standards established and maintained by Zehnder Rittling.

Mechanical specifications

35

Warranty Zehnder Rittling guarantees its products to be free from defects in material and workmanship for a period of twelve months from date of unit start-up or 18 months from date of shipment from our factory, whichever comes first. Should there be any defects in the good(s), the purchaser should promptly notify Zehnder Rittling. Upon receipt of written consent from Zehnder Rittling, the purchaser shall return the defective good(s) to the factory for inspection with freight prepaid. If inspection shows the goods to be defective, Zehnder Rittling will at its discretion repair or replace the said item(s). Defects arising from damage due to shipment, improper installation, negligence or misuse by others are not covered by this warranty.

IMPORTANT: Approved submittal documentation, specific to each project, supersedes the general guidelines contained within this document.

Zehnder Rittling · 100 Rittling Boulevard · Buffalo, NY USA 14220 T 716-827-6510 · F 716-827-6523 · [email protected] · www.zehnder-rittling.com

© Zehnder Rittling July 2014, English, subject to change without notice

This warranty is extended only to the original purchaser from Zehnder Rittling.